Brake operating mechanism



Sept. 13, 1932. E. L. I 'AUNDER ET AL BRAKE OPERATING MECHANISM FiledApril 5, 1931 Patented Sept. `13, 19732 nnNIn Lnorn I.Ar`U' \T I nn,` orMoNTnBnLLo, AND wILLrAM CALIFORNIA Application inea April 3, '1921.`seal 110.527,460.,

. This invention relates tofbrake Vmechanisms, and relates moreparticularly to the operating mechanisms of. lbralremeans of thecharacter employed inconnection with the hoistingdrums of Well `drillingapparatus, or

Vthe like. f

The type of brake mechanism usually em"- ployed Lfor controlling thehoistingdrum of Well drilling equipmentrincludes one or two lbralrebands for co-operating with flanges on the hoisting drum, and anoperating shaft operable by pivoting or partial rotationto bring thebands .into and out of braking engagement Withthe flanges, VThere areycertain phases 'of operation of this class of mechanism in which thebrake bands have na ltendency to bind -on the brake flangesand cause theoperating shaft and its handle to kick or fly/back rapidlyandvvithconsiderable force.

,This reflex action or lriclring back of the operating handle isextremely objectionableand dangerous for the operator.

It is a general object of y provide a safe, dependable operating meansfor 'a hoisting drum brake mechanism in Which the operating` handlecannot be shifted by refleX actionof the braking parts.-

It is another object ofthe invention to provide `brake operatingmechanism of the character mentioned that V.provides a positive,

Veffective connection between the shaft of the brake mechanism and theoperating` handle. Another object of the invention is to pro.-

vide a brake mechanism of the character men tioned that may be embodiedin varioustypes of brakes, or. that may be embodied in the `form 4of anattachment for use Withbrake mechanisms of various types. Y.

' It is another object of the invention to provide a brake control* oroperating device-of the character mentioned that is simple andinexpensive of manufacture and that may be vapplied tobrakemechanismwithout modiiication or alteration of the mechanism.

Other objects :and features of our invention Wil be bestand more fullyYunderstood from thefollowing detailed description of atypical form" andaplication of the invention,

throughout which a description reference .the invention to Y'r'.fLAUNnERQoF ANAHEIM, y, l

Willlbehad to the drawing, in l Which Fig. Itis a View ofatypicn'hoisang drum and the brake means therefor, illustrating thedevice provided by the present `invention in connection With thebrake"means 'Fig`.'2 is Vanenlarged.vievvof theV outerV end of thedevice, being a .viewtakenas indicated by' line ,2 2 on Fig. 1L Fig. 3isanlenlarged vertical detailed sectional vievv taken as indicatedr byline 3 3 on FigQl, and Fig. Zlis an enlarged sectional.vievvtakenasindicatedfbylin'e i onFigS,

g The brake controllinglor loperatingdevice l provided bythe presentinvention isadapted to be embodied in forms for installation invarioustypes of hoisting drumfbralresfas initially constructed ormanufactured or inthe form Aof an attachment to be,` applied to'a brakemechanism. In the drawing, y We yhave 'r illustrated a typical 'brakemechanismffor controlling the Winding or hoisting drum of f a Welldrilling apparatus and have illustrated the device `provided bythisinvention em-V bodied therein or applied theretdf It istobeunderstood `that' the invention is not to be taken as restricted to theparticular form or application about to'bedescribed, butis to be takenas including anyffeatures or modifications that may fallWithin'thefscope 'of the claims. 'e f '4 i.

The hoisting drum and bralremechanism illustrated in Fig. lof thedrawing includes,

shaft 11, a clutch '12 for connecting thedrum .with the shaft forrotation, operating means 1,3.for the clutch, brake bands 14forcooperating With flanges at theopposite ends .of the drum 10, aVhorizontal `bralre operating `shaft ing 18,-a shaft 19 extendingthroughthe housag 18 and. adapted to bie connected with @he generally, thehoisting drumV lOlcarried ona includes, generally, a stationary bodyorhous-` y iiXed on the shaft 19 within the housing 18,

brake shoes 21 for engaging or co-operating with the housingv18, togglemeans 22 iieXibly connecting the brake shoes 21 with the rotor Y 2Owhereby movement of the rotor in one direction relative to the housingcauses the shoes 21 to frictionally engage the housing 10 andV `prevent4further move-menty of the rotor, an

operating handle 23, and means 24 connected y with the handle 23 forco-operating with the rbrake shoes'21 to cause the release ofthe brake..Vl

The housing 18 is the fixed er rstationary element of themechanism andis adapted to be mounted at a-suitable point in axial l alignnient withthe shaft 15 of the brake mechavrnism. In'I the particular caseillustrated in the drawing, the body 18 is arranged lor niountedton the'floor at a point spaced from the outer end of the shaft y15. y Thebody' or housing 18 includes a cylindrical tubular central 'ormain part25. The mainpart 25 of "theho'usijnfg may be provided vwithdiametricaljly vopposite mounting ears or flanges 26. VThee'arsforiiang'e's26 are adapted to seat on spaced b'rackets'or supports 27l:torcarrying the housing 18. Openings 29 may belproy "vided inthe `ears26 "for passingfscrews 30 vfor"connecting 'with the brackets` 27. The

opening y31 inthe mainpart 25 is 'preferably concentric with ythecentral aXi's'of thehousjing 'andmay be provided with smooth axialwalls. "Cover or end plates 32 and-33 close ytheoppwsite Aends ofthemain part 25 vofthe housing.

' hejshaft 19feX'tends centrally :or vaxially Y throughthe housing .18and is provided to u carry the rotor 20 and operating handle y23. 'Injac'cordance Vwith the broader principles 'of the invention, the vshaft19 isin the :nature of 'an vextension or continuation vof the 'shaft l15 ofthe'brake'mechanisnr llt will b ereadily v` apparent thatthe'sh'aft 19 may bean integral continuation ofthe'shaft 15 or may be acom- Y paratively short part connected with the 'shaft in asuitablemanner. In the embodiment of the 'invention illustrated in `the drawing,

' i fthe shaft 19fisin'the nature of 1a separate'or @individual :partandjis connected withfthe shaft 15by 'a'suitable keyed coupling-3:4. The

/sliafttjlv'Q passesthrough 4openings l35 and-36 in the'en'd pl'ates32'and 33 respectively. An outwardly/projectingboss'37 may beproividedgaroundor at "the opening 35 of the iplat'e 32,'and ia suitablebushing 38` may be arranged'in the opening 35to carry'theshaft '19.. Theshaft 19 projects outwardly from Y'the outer endip'late'33 of the'housingto carry Vthe operating handle v23. y Y

The'rotor 2O i'siixedv or keyed konthe shaft 19 within the bodyYope`ning'31f'and is 'pro- 'vided to vcarry'th'e brake "shoes.21'andtoggle 'means '22. The rotor 20`n1a`y Van integral memberconnected kwith the shaft '19 by keys .rounded 40. The periphery oftherotor 20 is cylin# drical and has suitable clearance with the walls ofthe opening 31. Diametrically opf posite notches or recesses 41 areprovided ing with the walls of the opening 31. Inthe form of vtheinvention illustrated, there isa Y 'single brake fs'hoe 21`arra-nged ineach recess 41. brake shoes 21 are somewhat shorter'than the recesses 41and are positioned to leach have one 'end in A'engagement with lan endwall of a recess.. ln the particular const-ruction-ill-tis trated in thedrawing, the points of engagei ment of the ends of the shoes 21 with therof- `tor 20 `are in substantially the same'di'ametric plane.` Brakelining or friction lining 42 is provided in the outer sides of the shoes21 lto frictionallyengage or brake with the walls of the vopening'31.rIhe lining 42' maybe inset korxrecessled in the shoes 21 and mayberetained in position by suitable screws 43.

" The toggle means 22 `flexibly connects the brake shoes 21 withtherotor 2O so th-atthe "shoes are yforcedl into braking 'engagementwiththewalls of the opening 21 upon movement of thev rotor 2O inthedirectionindiV` v'cated bythe arrowuinv Fig. 3 Vofthe draw- .ing causedby kicking or' reflex action of 'the In accordance with the invention,`the J brake mechanism transmitted throughthe.

shaft15. In this manner the means-22 `connects therotor'wit'h the shoes21 to prevent the kicking `back to be transmitted to thel Aoperating4handle 23. The means 221inc`ludes toggle pins or blades 44 arrangedbetween the rotor 20 and shoes 21. The pins or blades 22 have pivotalContact at their ends with the rotorand'shoes21 so that the rotor mayhave F limited movement relative to the shoes.

There may be two 'toggle -pins 42 arranged between eachv shoe 21 and thelinner 'fwa'll of eachrecess 41'. V'.lheouterendsofthe pins or vrblades44 fare rounded and s-eatin rounded grooves 45 in v'theinner sidesoflthe shoes 21. The inner ends -of 'the blades 44-are lalso andco-oper'at'e with 'rounded grooves 46 in the inner walls of the recesses41.` rThe ends of the bladesor pins 44areffree 'to pivot in the grooves45 and V46. There cesses 45fand 46 'are-related sothatthe toggle willbeapparent Athat force transmitted `from l the shaft 15 to therotor'20turning the=rotor inthe direction indicated-by the arrow A inFig.A 3 ofthedrawing tendsv to move the inner ends of thetoggle'pins 44around toward po-. i

.pins 42 are normally substantially tangential l relative to theperiphery of theshaftl). The two sets ofpins carriedvin therecesses 41arev in like or corresponding positions.l` y It i namens sitions wherethe pins will be radial,so that the shoes 21 are forced outwardly toVco-oper ate Vwith the walls of the opening 31. `This action of thetoggle pins 44 prevents or stops the kick-back or refiex movement of theshaft 15. i

The invention provides means for ensuring proper contact of the shoes 21with the wallsv tween the toggle blades 44 and are preferablysubstantiallyrradial when the parts are lin the normal position. Thesprings 47 may be retained in position by screws 48.

The operating handle 23 is provided to control or operate the brakemechanism and is`mounted at the outer end of the housing 18.Inaccordance with the broader aspects of the invention, any suitableform of handle may be employed in connection with the in-V vention. Inthe drawing we have showna simple elongated handle 23 of round crosssection.` The handle 23 may be formedwith a hub having an opening 50 forreceivingthe outerprojecting part of the shaft 19. The sleeve 51 isVfree or rotatable on the shaft 19, and a bushing 52 may be providedbetween thesleeve andshaft. Keys 53 may beprovided to operativelyconnect the handle 23 with the sleeve 51. A plate 54 may be provided atthe outer end of the shaft 19 to retain the handle in position. v

|The means 24 is provided to co-operatively connect the handle 23 withthe rotor 2O or the shoes 21 when it is desired to control the brakemechanism. `The means 24 includes a radially projecting annular flange60 on the sleeve 51. The sleeve 51 extendsthrough the opening 36 in theend plate 33, and the flange 60 is provided within the opening 31. Arms61 project from the flange 60 at diametrically opposite points toproject into the recesses 41. The arms 61 extend axially through therecesses'41 at points between the free or outer ends of the shoes 21 andend walls of the recesses 41. The arms 61 are proportioned so as to havefree movement or playrbetween the ends of the shoes 21 and the end wallsof the recesses. Y

Throughout the drawing, the parts are illustrated in a normal or neutralposition. When it is desired to apply or set the brake mechanism, i, e.,when it is desired to bring the brake bands 14 into braking engagementwith the anges on the drum 10, the handle 23`is operated to turn thearms 61 to engage the rotor 20 and turn itin the direction indicated bythe arrow Bin Fig. 3. When the Vhandle- 23 :is operatedw fin this`manner, the

force `isiapplied directly-1 to"` the rotor i 20 to turn'or operate theshaftsr19rand 15.1y When itis desired'rte'frelease the brake mechanism,the handle' 23'is operated in theopposite direction-tobring the arms 61into contactwith the endsof the brake shoesI 21:..Y .Thebrake shoes are:adapted to `engage `the :rotor 2O y and causerit to be turned inthedinection indicated bythe arrow A, so that thev shafts 19and15areoperated torelease the brake bands `In' the event thatfthe` bands 14bind on'the drum flanges and ,causea kickback ori-'reflex forceto occuron theshaftl15,k it 1s transmitted :directlyxto the rotor 2()` causingit to turn in the .direction indicated by the arrow A. Movement ofthe'rotor 20 in this direction relative to the housing'l causesthe innerends ofthe toggle blades 44 toV swing. around toward positions where theblades are radial, i. e., the blades tendto straighteniout and forcejthebrake shoes `21 outwardly into tight 'engagement, with the wallsof theopening 31. This action ofthe` toggles44 and brake shoes 21 sto s theykick-4 back action and preventsit vfrom eing-transmittedto .thehandle23. @The springsl47- Y Y operateV to maintain the brake shoes inen-y i fgagement with the walls ofthe opening` 31 and to yieldinglyhold themagainst-movementr sor that sudden turning `of the rrotor caused by`a`kickvback in the brake mechanism cannotcauseshiftingofjthesho`es.-

The brakeoperating device provided bygthe present invention is simpleand sturdyinconstruction and provides a safe and dependable Y means foroperating the brake'of, a winding -V drum, .or the like.. Itisto'benoted that the device is in the nature of a clutch that pre-lvents ;undesirable movement` of the brake shaft 15 frornfbeingtransmitted to the oper.

ating handle 23., l I i i i Having described 'i nly va typicalpreferredform lof our invention, v.we do not wishto limit ourselves to thespecific details set forth, but wish to reserve to ourselves any changesor variations that may appear to those-skilled in theart or -fall withinthe scopeof the following claims. i i i Having described our invention,we claim: 1. In combination, theoperating shaftof a brake mechanism, aIstationary housing, a shaft extending completely through the housingand directly rigidly connected with the operating shaft, and means for'stopping movement of said shaft transmitted to it from the operatingshaft includingabrake shoe transmitted to it from the operating :shaftincluding a brake shoenfor co-operating with the housing, means fornormally yleldingly i ,holding the shoe -in engagement With the housing,and a toggle connection-between the shaft and shoe operable toforce theshoe into bra-king `engagement with the' housing and rigidly connectftheshaft with the shoe upon movement ofthe shaft in one direction.

3. In combination, the `operating shaft of a v brake .mechanisnnf a-vsta'tionary Vhousing through which the shaft extends, a rotor ontheshaftin the housing, and means for stopping movement ofthe vshaft inone direction relative to the housing including a brake shoe forengaging the housing, and meansV forV operating-the' shoe into.brakingfengagement with 'the housing and for connecting the rotor vviththe' shoe to hold it against movement relative to the shoe in isaiddirection, said last-mentioned means'including a toggle pin arrangedbetween the rotor and shoe.

- 4. In combination, the operating shaft of a brake mechanism,stationary housing f through Which the Vshaft extends, a rotor onand'rotor and normally substantially tangential to acircle 'concentricto the shaft. f

was

5f Inf combination, the operating shaftof a brake "mechanism, astationaryv housing throughk which the-'shaft extends, a rotor on theshaft in the housing., and means for stopping movement of the shaft inone direction relative to the housing including a brake shoe forengaging the housing, la togglev pin between the r'otorand shoe'operable -to force 'Y the shoe-into braking engagement With the housingupon movement ofthe rotor in one direction relative to the shoe causedVby movement of the shaft, and manually operable means for operatingtheshaft.

'G'.f'In a brake mechanism, an operating shaft, a housing through whichvthe shaft extends, means for 'turning the shaft to operate themechanism, and means in the housingfor preventing movement of the shaftcaused by reiex action of the mechanism from laffecting said operatingmeans, said means including an element on the shaft Within the housingto befengaged by 'the operating means, a brake4 shoe for co-operatinglWith thevvallsof the housing, and a toggle pin arranged betweenthe-element andthe shoe ypositioned relative to the` axis lof rotationof the shaft to cause actuation of th'e'brake shoe upon refiex movementof the shaft. ,Y z

' ZL-In a ybrake mechanism, an 4operating shaft, a housing throughWhichithe'shaft extends, means for turning the shaft to operate themechanism, and means in thehousing for preventing movement of the shaftcaused by in the other direction, and a toggle pin-havf Vingpivotalengagement With lthe element and brake shoe and positionedlrelative to the axis of rotation of the shaft to cause actuation of theshoe upon turning ofthe shaft caused by refiex action of the mechanism'.y y

8. VVVIn a brake mechanism, an operating shaft, a housingthrough whichthe shaft extends, means for turning the shaft to operate the mechanism,and .means in the housing for preventing movement of the shaft Vcausedby reflex action of the mechanism from affecting saidk operating means,saidmeans including an element on the shaft Within thefhousing to beengaged by :the 'operati-ng means to turn the shaft in one direction, abrake shoe for (3o-operating With-therwalls ofthe housing and engageableby the operating means to' co-operate with t-he element and turn theshaft in the otherdirect'ion,andv spaced toggle pins having pivotalengagement yvvith the ,elementr and shoe and arranged substantialaxisofrotation of the shaft to cause actuation of th-e shoeupon turning ofthe shaft Vcaused by'reflex action ofthe brake mechamsm. ,y

f9.1n a brake mechanism, an operating shaft, a housing throughWhicli'the shaft extends, la lsleeve free on the shaft and extendinginto the housing, operating. meansfor the sleeve, a rotor on the shaftin the housing, i ,1'10

a .shoe for braking with the. interiorrof the housing and adapted,V toengage the rotor,Y

ing into the housing, operating means `for the sleeve, a rotor on theshaft inthe housing,

a shoe for braking With th-e interior ofthe yhousing and adapted t-oengage the rotor, an arm carriedbyy the sleeveffor engaging the rotor toturnthe shaft in one direction and for engaging the shoe to turn therotor and shaft inf the.' other' direction, Vand means for preventingmovement ofthe shaft caused ly tangential toa c ircleconcentric With the.100,

by a kick-back of the brake mechanism from being transmitted to the saidoperating means, including a toggle pin having pivotal engagement Withthe rotor and the shoe and posit-ioned substantially tangential to acircle concentric With the shaft to move toward a radial position andactuate the shoe upon said movement of the shaft. p Y

11. ln a brake mechanism, an operating shaft,a housing through Which theshaft eX- tends, a sleeve free on the shaft and extending into thehousing, operating means for the sleeve, a rotor on the shaft in thehousing, ashoe for braking with the interior of the housing vand adaptedto engage the rotor, an arm carried by the sleeve for engaging the rotorto turn the shaft in 3 one direction and for engaging the shoe to turnthe rotor and shaft in the other direction, and means for preventingmovement of the shaft caused by a kick-back of the brake mechanism frombeingA transmitted to the said operating means,`

including a toggle pin having pivotal engagement with the rotor and theshoe and positioned substantially tangential to a circle concentric Withthe shaft to move toward a radial position and actuate the shoe uponsaid movement of the shaft and means for normally yieldingly holding theshoe in engagement with the housing.

l2. In a brake mechanism, an operating shaft, a housing through whichthe shaft eX- tends, a sleeve free on the shaft and extending into thehousing, operating means for the sleeve, a rotor on the shaft in thehousing, a shoe for braking With the interior of the housing and adaptedto engage the rotor, an arm carried by the sleeve for engaging the rotorto turn the shaft in one direction and for engaging the Vshoe to turnthe rotor and shaft in the other direction, and means for preventingmovement of the shaft caused by a kick-back of the brake mechanism frombeing transmitted to the said operating means, including a toggle pinhaving pivotal engagement with the rotor and the shoe and positionedsubstantially tangential to a circle concentric With the shaft to movetoward a radial :position and actuate the shoe upon said movement of theshaft, and a spring for normally Y yieldingly holding the shoe inengagement with the housing.

In Witness that We claim the foregoing We have hereunto subscribed ournames this 10th day of March, 1931. Y

ERNIE LLOYD LAUNDER.

WILLIAM T. LAUNDER.

